Re: st: relation between 2 coefficients in a regression analysis

On Fri, Apr 5, 2013 at 4:26 AM, Rodrigo Badilla wrote:
> I would like know if there exist some test or command to get the
> relation or effect
> between two coefficients in the a same model for independent variables in a
> multivariable regression analysis in panel data.
It is unclear to me what you want:
Are you looking for the covariance in the sampling distribution of the
coefficients? In that case type -matlist e(V)- after estimating your
model.
Are you looking for how much the effect of one variable changes as
another variable changes? This is called an interaction effect. Look
at -help fvvarlist-.
Hope this helps,
Maarten
---------------------------------
Maarten L. Buis
WZB
Reichpietschufer 50
10785 Berlin
Germany
http://www.maartenbuis.nl
---------------------------------
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/